Frase - convertendo para maiúscula

Querendo converter uma frase inteira
escrita em minúscula para maiúscula
usamos o método toUpperCase();
este método retorna a forma maiúscula
do valor char especificado.

Veja uma imagem abaixo referente ao programa:

Veja o código abaixo:

import java.util.Scanner;

public class PROJETO {

     public static void main ( String args [ ] ) {

         J jht = new J ( );

         jht.textbackground ( jht.WHITE );

         jht.Moldura ( ( short ) 1, ( short ) 24, ( short ) 2, ( short ) 68 );

         jht.title ( " " );

         int i, quant = 0;

         String frase = "";

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( int ) 20, ( int ) 3 );

         System.out.printf ( "FRASE - CONVERTENDO EM MAIÚSCULAS" );

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( int ) 13, ( int ) 5 );

         System.out.printf ( "Digite uma frase ==> " );

         jht.textcolor ( jht.LIGHTRED );

         Scanner dados = new Scanner ( System.in );

         frase = dados.nextLine ( );

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( int ) 13, ( int ) 7 );

         System.out.printf ( "Frase digitada ==> " );

         jht.textcolor ( jht.LIGHTRED );

         System.out.print ( frase );

         jht.getche ( );

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( int ) 13, ( int ) 9 );

         System.out.printf ( "Abaixo a frase convertida em maiúscula" );

         jht.gotoxy ( ( int ) 13, ( int ) 11 );

         jht.textcolor ( jht.LIGHTRED );

         System.out.print ( frase.toUpperCase ( ) );

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( int ) 20, ( int ) 17 );

         jht.Sleep ( ( short ) 1800 );

         System.out.printf ( "Por: " );

         jht.textcolor ( jht.LIGHTMAGENTA );

         System.out.printf ( "Samuel Lima" );

         jht.textcolor ( jht.BLACK );

         jht.gotoxy ( ( int ) 20, ( int ) 18 );

         System.out.printf ( "sa_sp10@hotmail.com" );

         jht.Sleep ( ( short ) 1800 );

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( int ) 29, ( int ) 22 );

         System.out.printf ( "MUITO OBRIGADO" );

         jht.getche ( );

     }

}